The fine people over at TextDrive run ModSecurity on their Apache servers. ModSecurity takes care of filtering out most evil comment spammers requests before they even have a chance to actually hit the applications running on the server (i.e. WordPress). This is all great, unless of course your mom tries to make a comment and gets a HTTP 412 Error, The precondition given in one or more of the request-header fields evaluated to false when it was tested on the server.. The problem is that the referrer in this case has the evil word sex in it. Last I checked, sexagenarian wasn’t dirty (I don’t think Texas has banned it yet, but they might try to soon. Any word over 2 syllables matching the regex ".*$DEVIL_WORD.*" will be stricken from the dictionary). Thanks to An introduction to mod_security, I added the following to my .htaccess and all is well.
SecFilterSelective "HTTP_REFERER" "the-newest-member-of-the-sexagenarian-club" "allow"
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